Lift dependencies to the workspace (Part 1) (#2070)

Changes (partial https://github.com/paritytech/polkadot-sdk/issues/994):
- Set log to `0.4.20` everywhere
- Lift `log` to the workspace

Starting with a simpler one after seeing
https://github.com/paritytech/polkadot-sdk/pull/2065 from @jsdw.
This sets the `default-features` to `false` in the root and then
overwrites that in each create to its original value. This is necessary
since otherwise the `default` features are additive and its impossible
to disable them in the crate again once they are enabled in the
workspace.

I am using a tool to do this, so its mostly a test to see that it works
as expected.

---------

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

substrate/utils/frame/rpc/system/Cargo.toml

@@ -19,7 +19,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 codec = { package = "parity-scale-codec", version = "3.6.1" }
 jsonrpsee = { version = "0.20.3", features = ["client-core", "macros", "server"] }
 futures = "0.3.21"
-log = "0.4.17"
+log = { workspace = true, default-features = true }
 frame-system-rpc-runtime-api = { path = "../../../../frame/system/rpc/runtime-api" }
 sc-rpc-api = { path = "../../../../client/rpc-api" }
 sc-transaction-pool-api = { path = "../../../../client/transaction-pool/api" }